Unit testing in Javascript can be tedious and painful, but Testem makes it so easy that you will actually want to write tests.

PhantomJS is a headless WebKit scriptable with a JavaScript API. It has fast and native support for various web standards: DOM handling, CSS selector, JSON, Canvas, and SVG.

position: absolute;
margin-left: auto;
margin-right: auto;
left: 0;
right: 0;

Un framework front-end moderne basé sur le Material Design